Extreme simple Sniperbuild. And its cool! Alternative with almost Max Armor, but little slower: Blagg
You could use the max engine if so desired As per your build, I would run 2 small lasers, for a bit of brawling ability
Gaining < 5 kph for losing so much Armor on a fragile 40tonner? No good deal. Max Speed was my first idea, but not at such big tradeoff. If you want Brawling Ability, then this build is not suited , unless you really want to downgrade the Engine. In my opinion also bad idea.